He definitely lied without question. Like I said, he admitted it outright, and has done so more than once. There's an article here about it that provides all the links needed to verify this, written by an epidemiologist:
https://slate.com/technology/2021/07/noble-lies-covid-fauci-...
As the article states, there was no change in available data. That is yet another lie. If there was, he'd have pointed to the new study and everyone would have been looking at it, because it would be extremely famous as the study that upended mask science. No such study exists. One day "the science" changed, except it hadn't really changed, simple as that. He did the same with vaccine herd immunity:
"When polls said only about half of all Americans would take a vaccine, I was saying herd immunity would take 70 to 75 percent. Then, when newer surveys said 60 percent or more would take it, I thought, “I can nudge this up a bit,” so I went to 80, 85."
The man is a liar. He makes claims about scientific issues that he makes up on the spot to generate policy compliance. He ran most of the US COVID response, therefore nothing he said can be trusted, nor can anything said by anyone who reported to him. That makes him by far the biggest source of COVID misinformation out there, by his own admission!
"it's not on the same level as what the Daily Sceptic is publishing"
That's right! The Daily Sceptic was created specifically to combat the sort of COVID misinformation government officials like Fauci, Ferguson and SAGE were spreading. I don't read it much anymore but I read it throughout COVID and its writers never lied, or at least I never caught it if they did. And they reply to people trying to "fact check" them, they don't ignore criticism. Every day, they downloaded the data, downloaded the papers, checked them against the claims being made and documented when they didn't match. They showed that "the science" was being made up on the fly and frequently built on bullshit. They are by far the best COVID fact checkers out there, which is why establishment authoritarians inside PayPal can't stand them.
"Here in the UK it certainly felt like the government was basically playing catch-up and giving out advice only if they thought it had a high chance of being followed."
The UK enforced its decisions via police power and fines, it wasn't voluntary. But regardless, the UK health authorities also routinely spread misinformation. As just one example SAGE claimed there was no data on Omicron severity so they'd assume it was as severe as delta, even though from the moment Omicron was discovered it was accompanied by data showing it was far less severe. They just ignored all of it, in an attempt to keep lockdowns going as long as possible. And they lied to the government about the contents of their own meetings (Sunak talked about this).
Fundamentally, if you want to crack down on COVID misinformation, government agencies have to be the first to go. Nobody else comes close to their impact.